/Engine/Source/Runtime/Slate/Public/Widgets/Input/SCheckBox.h
SeeSWidget::OnMouseButtonDoubleClick.
Whether the event was handled along with possible requests for the system to take action.
virtual [FReply](API\Runtime\SlateCore\Input\FReply) OnMouseButtonDoubleClick ( const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & InMyGeometry, const [FPointerEvent](API\Runtime\SlateCore\Input\FPointerEvent) & InMouseEvent )